(question) File import/export in LibreOffice Spreadsheet -- where to look?

[Miklos Vajna]

On Sat, Nov 10, 2012 at 06:23:02PM -0500, William Park <opengeometry at yahoo.ca> wrote:
> As a way of learning LibreOffice Spreadsheet code, I would like to add a
> simple file import/export.  The file format is sort of 3-column CSV
> format.  Can someone point me to directory/file I should look at?

This is done in general by implementing an XFilter service for UNO
filters. When you're done with that, you'll need to register it. On this
later, Kohei had a post:

http://kohei.us/2007/05/08/how-to-pretend-to-write-an-export-filter/